Here is the answer to the question, "Ok, but what exactly does a hermitage look like, anyway?"
(Short answer: it's a cabin.)
It's so basic a small cottage - bedroom, common area, kitchenette, bathroom - that photos of the over-all room came out kind of boring. Really, I use the hermitage for sleeping, showering, and reading (or whatever else it is you do when the midday heat just makes it too impossible to be out in the garden).
And as for my sister's follow-up question, "Ok, but why do you call it a hermitage, then?" I can only answer that localized terminology isn't unique to the religious life. Why is a kitchen on a ship not a kitchen but a galley, a scored point is a run in baseball but a goal in hockey, and the job I'll be starting next week is called "8th grade teacher" instead of "surrogate-parent-and-counselor"?